Brake shoe



1 Feb. 26, 1924;

Jase ah J far/".

Patented Feb. 26, 1924.

entree stares JOSEPH J. KARE, OF LINNTON, OREGON.

BRAKE SHOE.

Application filed December 6, 1921. Serial No. 520,372.

To all whom it may concern:

Be it known that I, J osnrn J. KARR, a citizen of the United States,residing at Linnton, in the county of Multnomah and State of Oregon,have invented new and useful Improvements in Brake Shoes, of which thefollowing is a specification.

This invention relates tobrake shoe structures and the method of makingthe same.

An object of th present invention is the provision of a composite brakeshoe which includes a maximum amount of wearing qualities and for thispurpose comprises a molded metal body and a malleable (preferably steel)backing or reinforcing plate, arranged so as to provide a maximum degreeof strength and permit of the wearing away of practically all of thecast body Without danger of breaking.

With the above and other objects in View, the invention further includesthe following novel features and details of construction, to behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claim.

In the drawings Figure 1 is a side elevation of a brake shoe constructedin accordance with the invention.

Figure 2 is a back view of the same.

Figure 3 is a. section on the line 33 of Figure 1.

Figure 4 is a similar view on the line H of Figure 1.

Figure 5 is a longitudinal sectional view on the line 55 of Figure 2.

Figure 6 is a detail perspective view of the backing or reinforcingplate.

Figure 7 is a detail perspective view of the eye.

Referring in detail to the drawings. wherein like characters ofreference denote corresponding parts, the improved shoe is made up of abacking or reinforcing plate 10 which is preferably formed of malleablesteel and is transversely crowned to provide a substantially U-shapedmember having outwardly fl'ared side walls. As shown in Figures 3 and 4the side walls of the intermediate or central portion of the plate 10have a greater flare than the end portions. The plate 10 is formedthroughout its length with spaced openings 11 and is provided on itsopposite side walls with slots 12 for the reception of the inturned ends13 of a substantially U-shaped member 14, the latter forming the eye forthe shoe. The plate 10 is also longitudinally crowned so that itshighest point is located centrally as shown at 16. i

In making the shoe, the plate 10 is inserted within a suitable mold andthe shoe body which is indicated at 17 is formed by molding the samearound the plate so that the longitudinal edges 18 of the plate areembedded in the body with the molded metal filling the channel formed bythe transverse crown plate. The openings 11 are filled with the moldedmetal of the body, while the extremities of the plate are molded withinlugs 19 formed at each end of the body with the extremities of the plateflush with the rear edge of these lugs. The intermediate portion of theplate 10 is flush -with the intermediate portion of the shoe body andthe opposite side members of the U-shaped eye 14: are molded within lugs20 which are formed integral with and extend from the back of the body.

The process of placing the crowned steel back in a mold and pouring thehot iron into the same has a tendency to anneal or soften that portionof the crowned back which is embedded in the main body of the shoe toabout the same texture or sOftneSs as the cast iron so that a perfectjoint between the back and shoe is provided. In case the brake shoe isWorn to the embedded portion of the back, the contact of the steel upona wheel would be the same as that of cast iron. It will be thereforeseen that there is no danger of the embedded steel wearing the wheel anymore than the c'ast iron body. It permits the brake shoe being worn to agreater degree with safety and reduces materially the amount of wastedue to discarded shoes.

The invention is susceptible of various changes in its form, proportionsand minor details of construction and the right is herein reserved tomake such changes as proper- 1y fall within the scope of the appendedarm.

the back of the bod and'a substantially reotangular loop mol ed in thebody with its 10 upper surface flush with the upper face of the lug andhaving its ends engaged with the bowed plate.

In testimony whereof I afiix my signature.

JosiiPH J. KARE.

